package IO;

import java.io.*;
import java.util.Scanner;

public class IO18 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入源文件路径");
        String  srcPath = scanner.next();
        File srcFile = new File(srcPath);
        if(!srcFile.isFile()){
            System.out.println("源文件路径有误");
            return;
        }
        System.out.println("请输入目标文件的路径");
        String destPath = scanner.next();
        File destFile = new File(destPath);
        if(!destFile.getParentFile().isDirectory()){
            System.out.println("目标文件路径有误");
            return;
        }
        try(InputStream inputStream = new FileInputStream(srcFile);
            OutputStream outputStream = new FileOutputStream(destFile)) {
            while(true){
                byte[] buffer = new byte[1024];
                int n = inputStream.read(buffer);
                if(n==-1){
                    break;
                }
                outputStream.write(buffer,0,n);
            }
        } catch (FileNotFoundException e) {
            throw new RuntimeException(e);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}
